Iron restraint which was used for torture of medieval Europe. This work that the cold hard iron got into the body of a woman and must endure the pain of restraint which ignored the structure of the human body at all. This time, “Kuroki Sumi” gave a name for this cruel and cold-blooded torture. The whole body is dominated by black ironed shoulder that emits an unpleasant radiance, and a lot of things such as bintha, nasal enema, deep muscle, whip and merciless torture are unfolded. While the iron and iron rubbing sound, the napping sound, and the woman’s scream are echoing, the anus that was deprived of freedom is attacked by teens and toys, and even legendary torture tools transmitted from ancient times. Her pain dominated completely by anal changed to pleasure eventually, becoming a prisoner of restraint of ironbreaking to deepen her own M characteristics.